EP0037782B1 - Verfahren zur Modifizierung der Eigenschaften blähender Kohle, Einrichtung zur Durchführung des Verfahrens und Gefäss zur Behandlung durch Wirbeln und Mahlen - Google Patents
Verfahren zur Modifizierung der Eigenschaften blähender Kohle, Einrichtung zur Durchführung des Verfahrens und Gefäss zur Behandlung durch Wirbeln und Mahlen Download PDFInfo
- Publication number
- EP0037782B1 EP0037782B1 EP81400536A EP81400536A EP0037782B1 EP 0037782 B1 EP0037782 B1 EP 0037782B1 EP 81400536 A EP81400536 A EP 81400536A EP 81400536 A EP81400536 A EP 81400536A EP 0037782 B1 EP0037782 B1 EP 0037782B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- enclosure
- fluidisation
- fines
- treatment
- duct
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000003245 coal Substances 0.000 title claims description 28
- 238000000227 grinding Methods 0.000 title claims description 21
- 238000000034 method Methods 0.000 title claims description 19
- 230000008569 process Effects 0.000 title claims description 17
- 230000008961 swelling Effects 0.000 title claims description 10
- 238000012986 modification Methods 0.000 title claims description 3
- 230000004048 modification Effects 0.000 title claims description 3
- 238000005243 fluidization Methods 0.000 claims description 40
- 238000002485 combustion reaction Methods 0.000 claims description 22
- 239000003517 fume Substances 0.000 claims description 20
- 238000009434 installation Methods 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 238000007254 oxidation reaction Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 7
- UDHXJZHVNHGCEC-UHFFFAOYSA-N Chlorophacinone Chemical compound C1=CC(Cl)=CC=C1C(C=1C=CC=CC=1)C(=O)C1C(=O)C2=CC=CC=C2C1=O UDHXJZHVNHGCEC-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 230000002522 swelling effect Effects 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 claims 3
- 230000002950 deficient Effects 0.000 claims 2
- 238000001033 granulometry Methods 0.000 claims 2
- 239000007789 gas Substances 0.000 description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 239000000571 coke Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000003610 charcoal Substances 0.000 description 3
- 102100023055 Neurofilament medium polypeptide Human genes 0.000 description 2
- 101710109612 Neurofilament medium polypeptide Proteins 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000003039 volatile agent Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000010626 work up procedure Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/02—Treating solid fuels to improve their combustion by chemical means
- C10L9/06—Treating solid fuels to improve their combustion by chemical means by oxidation
Definitions
- the subject of the invention is a process for modifying, by gentle oxidation, the swelling properties of a swelling coal with an AFNOR swelling index of between 2.5 and 6, such as a flaming fat, as well as an installation for the implementation of the process and a fluidization and grinding treatment enclosure.
- the object of the invention is to propose a new process, a new installation and a new enclosure making it possible to modify the swelling properties of the swelling coals while substantially retaining their volatile matter content, and consequently to allow the use of such coals. for the manufacture of molded coke or semi-coke in a rotary kiln or in a fluidized bed. Another object is to avoid the degradation of the treated coals while using hotter fumes, and therefore with a faster effect.
- This object is achieved, according to the invention, by a process in which a fluidized bed is subjected in a fluidization enclosure comprising a narrowed upper zone for driving the fines of said coal, in which the temperature is adjusted to at least 300 ° C by means of hot combustion fumes having an oxygen content greater than 10%, and by the fact that coal is introduced into the fluidization enclosure with a coarser particle size than the desired particle size and that it is subjected in the fluidization enclosure to a grinding treatment.
- the temperature in the fluidized bed is adjusted between 300 and 360 ° C, preferably in the vicinity of 340 ° C, and the fines are subjected to an impact grinding treatment in an area of the enclosure between fluidized bed and narrowed drive area.
- the fines are dried before introducing them into the fluidization enclosure, preferably by introducing them into a current at a speed of drive of the hot fluidization fumes.
- the temperature of the hot combustion fumes is adjusted to a value greater than 500 ° C. and preferably between 500 and 800 ° C.
- the process in fact makes it possible to introduce wet coal into the installation in the form grains of the order of one to a few millimeters in diameter which can withstand without damage contact with gases at high temperature. This results in a significant increase in the production capacity of the installation.
- the treated fines are brought to a storage container and an oxygen-depleted atmosphere is established in this storage container; to obtain an oxygen-depleted atmosphere, part of the fumes having entrained the treated fines are introduced into said storage container.
- Such an installation therefore has modifications, appropriate to the implementation of the method, with respect to coal drying and preheating installations in which the previously ground wet coal is brought into contact with neutral hot fumes, then where the coal and the fumes are introduced into a fluidization enclosure at the base of which rotates a grinding mobile.
- Such installations are for example described in the French patent N ° 1555546 of the holder.
- the invention also relates to a fluidization and grinding treatment chamber at the base of which opens a conduit for a gaseous fluidization and drive agent and provided with an impact grinding mobile, comprising means for introducing into said enclosure and / or said pipe of granular and / or powdery materials and comprising a pipe for driving the materials treated with the gaseous agent connecting to the upper part of the enclosure for treatment by fluidization and grinding, in which the mobile impact grinding is arranged in an intermediate zone of the treatment enclosure, its lowest point being at least 1 m above the connection zone between the line for drying the fines to be treated and the treatment enclosure treatment.
- the installation and especially the treatment chamber used for the implementation of the invention differ essentially from those used for drying and preheating the coal according to the teaching of French Patent No. 1555546, by the fact that the grinding mobile is placed not at the base of the fluidized zone, but at the upper or middle part thereof, which has the effect of increasing the residence time of the coal within the bed fluidized.
- the installation shown comprises an enclosure 1 for fluidization treatment comprising a constant rectangular cross section over a height H, progressively connected at its base to a pipe 2 for a gaseous fluidization agent and, progressively, by a narrowing connection zone 3 , for speed increase, to a pipe 4 for driving the treated fines.
- Coal in the state of fines is brought by a conveyor 5 on a screen 6 where the passer-by is taken up by a screw feeder device 7 for introducing the coal fines into the pipe 2.
- a combustion chamber 8 supplied with gas and air respectively by the lines 9 and 10, the air being pulsed by a fan 11.
- a regulating device 12 controls the flow rates of gas and air at a set temperature measured by a thermometric probe 13 placed in the enclosure 1 and regulates the proportion of gas and air with an excess of air such that the fumes produced in the combustion chamber 8 have an oxygen content greater than 10%.
- the height H of the constant section of the parallelepiped part of the enclosure 1 is 3 m.
- This part of the enclosure whose cross section is 0.56 mxO, 18 m, comprises a rotating mobile 14 with a horizontal axis 15 of the impact mill type, such as a bar or hammer mill of a 0.4 m diameter; but, contrary to what is usually done, the axis of this mobile 14 is at a height such that there remains approximately 1 m between its lowest point and the lower part of the parallelepiped part of the enclosure.
- the mobile disposed in accordance with the invention plays a dispersing and / or regulating role more than grinding, the coal being introduced already fine.
- the mobile being in a higher position than usual, the fluidized bed is denser and the residence time is therefore longer, which is favorable for further processing.
- the line 4 for driving the oxidized charcoal opens into a battery of cyclones 16, at the vortex of which the fumes are evacuated and at the tip of which the oxidized charcoal is collected directly in a sealed hopper 17, with the exception of a vent degassing 18; at the base of this hopper is a humidifying recovery screw 19 for use 20.
- a humidifying recovery screw 19 for use 20.
- the invention has made it possible to reduce the swelling index substantially, without any appreciable reduction in the content of volatile matter and that the coal thus treated can be used as a raw material for making a semi-coke, which was impossible with the starting coal.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Crushing And Pulverization Processes (AREA)
- Coke Industry (AREA)
Claims (10)
dadurch gekennzeichnet, dass das bewegliche Mahlschlagelement (14) in einer Zwischenzone des Behandlungsgefässes (1 ) angeordnet ist und dass sein niedrigster Punkt wenigstens 1 m oberhalb der Verbindungszone zwischen der Leitung (2) zum Trocknen des zu behandelnden Kohlenkleins und dem Behandlungsgefäss (1) liegt, und dass die Einrichtungen zum Einstellen des Brennluftanteils zur Sicherung eines Luftüberschusses einstellbar ausgebildet sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8007726 | 1980-04-04 | ||
FR8007726A FR2479845A1 (fr) | 1980-04-04 | 1980-04-04 | Procede de modification des proprietes d'un charbon gonflant, installation pour la mise en oeuvre du procede et enceinte de traitement par fluidisation et broyage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0037782A1 EP0037782A1 (de) | 1981-10-14 |
EP0037782B1 true EP0037782B1 (de) | 1983-11-02 |
Family
ID=9240579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81400536A Expired EP0037782B1 (de) | 1980-04-04 | 1981-04-02 | Verfahren zur Modifizierung der Eigenschaften blähender Kohle, Einrichtung zur Durchführung des Verfahrens und Gefäss zur Behandlung durch Wirbeln und Mahlen |
Country Status (6)
Country | Link |
---|---|
US (1) | US4382777A (de) |
EP (1) | EP0037782B1 (de) |
JP (1) | JPS5710681A (de) |
BR (1) | BR8102036A (de) |
DE (1) | DE3161303D1 (de) |
FR (1) | FR2479845A1 (de) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1611791A (en) * | 1925-07-20 | 1926-12-21 | Celite Company | Process of and apparatus for treating minerals |
US1954350A (en) * | 1931-03-28 | 1934-04-10 | Milwaukee Electric Railway And | Apparatus for treating pulverized fuel such as coal and the like |
GB641422A (en) * | 1946-01-16 | 1950-08-09 | American Cyanamid Co | A method of subjecting badly swelling and/or caking coal to an oxidizing pretreatment prior to coking to improve the coking properties thereof |
US2763478A (en) * | 1949-08-22 | 1956-09-18 | Vernon F Parry | Apparatus for drying solids in a fluidized bed |
FR1332711A (fr) * | 1962-06-07 | 1963-07-19 | Charbonnages De France | Procédé perfectionné d'obtention de combustibles sans fumée et produits obtenus |
FR1448898A (fr) * | 1965-06-16 | 1966-08-12 | Charbonnages De France | Procédé perfectionné de traitement thermique de produits partiellement combustibles se présentant ou conditionnés sous la forme de boues et dispositif mettant en oeuvre ledit procédé |
FR1555546A (de) * | 1967-06-30 | 1969-01-31 | ||
FR2378081A1 (fr) * | 1977-01-24 | 1978-08-18 | Charbonnages De France | Installation et procede de regulation du prechauffage de charbon a cokefier |
-
1980
- 1980-04-04 FR FR8007726A patent/FR2479845A1/fr active Granted
-
1981
- 1981-04-02 DE DE8181400536T patent/DE3161303D1/de not_active Expired
- 1981-04-02 EP EP81400536A patent/EP0037782B1/de not_active Expired
- 1981-04-03 JP JP4947681A patent/JPS5710681A/ja active Pending
- 1981-04-03 US US06/250,715 patent/US4382777A/en not_active Expired - Fee Related
- 1981-04-03 BR BR8102036A patent/BR8102036A/pt unknown
Also Published As
Publication number | Publication date |
---|---|
FR2479845B1 (de) | 1984-08-03 |
DE3161303D1 (en) | 1983-12-08 |
US4382777A (en) | 1983-05-10 |
BR8102036A (pt) | 1981-10-06 |
FR2479845A1 (fr) | 1981-10-09 |
JPS5710681A (en) | 1982-01-20 |
EP0037782A1 (de) | 1981-10-14 |
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